Finding the Fourth Proportional to 13,255.45, 18,292.71 and 7,287.67

Step by Step Solution

1. Step 1: Write the proportion equation
   13,255.45 : 18,292.71 = 7,287.67 : x
2. Step 2: Convert to fraction form
   13,255.45/18,292.71 = 7,287.67/x
3. Step 3: Cross multiply
   13,255.45x = 18,292.71 × 7,287.67
4. Step 4: Simplify right side
   13,255.45x = 133,311,233.89
5. Step 5: Solve for x
   x = 133,311,233.89/13,255.45
6. Step 6: Final answer
   x = 10,057.09